Eroare de compilare: main.cpp:13:22: error: 'Point' was not declared in this scope double cross_product(Point O, Point A, Point B) ^~~~~ main.cpp:13:31: error: 'Point' was not declared in this scope double cross_product(Point O, Point A, Point B) ^~~~~ main.cpp:13:40: error: 'Point' was not declared in this scope double cross_product(Point O, Point A, Point B) ^~~~~ main.cpp:13:47: error: expression list treated as compound expression in initializer [-fpermissive] double cross_product(Point O, Point A, Point B) ^ main.cpp: In function 'int main()': main.cpp:29:77: error: 'cross_product' cannot be used as a function while (head >= 2 && cross_product(v[st[head - 1]], v[st[head]], v[i]) < EPS) ^ Non zero exit status: 1